Use a direct include of strings headers in chrome/browser/ui/b*-p*/.

chrome/browser/ui/browser_close_browsertest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/path_service.h"
 #include "base/prefs/pref_service.h"
-#include "base/stringprintf.h"
+#include "base/strings/stringprintf.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/download/download_service.h"
 #include "chrome/browser/download/download_service_factory.h"
 #include "chrome/browser/download/download_test_file_activity_observer.h"
 #include "chrome/browser/net/url_request_mock_util.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_iterator.h"
 #include "chrome/browser/ui/browser_tabstrip.h"
@@ skipping 545 matching lines @@
   }
 }
 
 IN_PROC_BROWSER_TEST_F(BrowserCloseTest, MAYBE_DownloadsCloseCheck_5) {
   ASSERT_TRUE(SetupForDownloadCloseCheck());
   for (size_t i = 5 * arraysize(download_close_check_cases) / 6;
        i < 6 * arraysize(download_close_check_cases) / 6; ++i) {
     ExecuteDownloadCloseCheckCase(i);
   }
 }